In this service, affiliated institutions' e-mail is redirected to RedIRIS high-availability servers with the latest generation in anti-spam filtering software so that RedIRIS can deliver “clean e-mail” to the institutions (this is where the “Washer” name comes from).

The affiliated institutions can also customise the default filters as well as setting up local quarantine services for their account in order to give users the option of checking filtered messages before they are deleted.